CVE-2026-15816
Full vulnerability record from the local CVENow database.
Description
A flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-07 11:17:05.100000
Last modified
2026-10-27 22:17:26.037000
View original CVE JSON
{
"id": "CVE-2026-15816",
"sourceIdentifier": "[email protected]",
"published": "2026-08-07T11:17:05.100",
"lastModified": "2026-10-27T22:17:26.037",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
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{
"lang": "en",
"value": "A flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling."
}
],
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{
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"metrics": {
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{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
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"id": "CVE-2026-15816",
"options": [
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{
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{
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],
"role": "CISA Coordinator",
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-78"
}
]
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],
"references": [
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"source": "[email protected]"
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{
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{
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{
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{
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{
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{
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"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:69119",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:70586",
"source": "[email protected]"
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{
"url": "https://access.redhat.com/errata/RHSA-2026:70615",
"source": "[email protected]"
},
{
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"source": "[email protected]"
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{
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{
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{
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{
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"source": "[email protected]"
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{
"url": "https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh",
"source": "[email protected]"
},
{
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}
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}